<template>
  <!-- 工作日历 -->
  <div>
    <!-- 年和月 -->
    <el-row
      type="flex"
      justify="end"
    >
      <!-- 年 -->
      <el-select
        v-model="currentYear"
        size="small"
        style="width: 120px"
        @change="dateChange"
      >
        <el-option
          v-for="item in yearList"
          :key="item"
          :label="item"
          :value="item"
        >{{ item }}</el-option>
      </el-select>
      <!-- 月 -->
      <el-select
        v-model="currentMonth"
        size="small"
        style="width: 120px; margin-left:10px"
        @change="dateChange"
      >
        <el-option
          v-for="item in 12"
          :key="item"
          :label="item"
          :value="item"
        >{{ item }}</el-option>
      </el-select>
    </el-row>
    <!-- 日期组件 -->
    <el-calendar v-model="currentDate">
      <!-- date 当前单元格日期 data是Object -->
      <template
        v-slot:dateCell="{ date, data }"
        class="content"
      >
        <div class="date-content">
          <span class="text"> {{ data.day | getDay }}</span>
          <span
            v-if="isWeek(date)"
            class="rest"
          >休</span>
        </div>
      </template>
    </el-calendar>
  </div>
</template>

<script>
export default {
  name: 'WorkCalendar',
  // 过滤器
  filters: {
    getDay (val) {
      var day = val.split('-')[2]
      // 已'0' 开头将'0' 截取
      return day.startsWith('0') ? day.substr(1) : day
    }
  },
  props: {
    startDate: { // 传进来的时间
      type: Date,
      default: () => new Date() // 默认时间为当前时间
    }
  },
  data () {
    return {
      currentMonth: null, // 当前月份
      currentYear: null, // 当前年份
      currentDate: null, // 当前时间
      yearList: [] // 年 前5年 + 后5年

    }
  },
  created () {
    // 1. 获取当前年份 月份
    this.currentYear = this.startDate.getFullYear()
    this.currentMonth = this.startDate.getMonth() + 1
    // 2. 存入yearList数组
    this.yearList = Array.from(11, (v, i) => {
      return i + this.currentYear - 5
    })
    this.dateChange()
  },
  methods: {
    isWeek (date) { // 判断是不是周六/日 6/0
      return date.getDay() === 6 || date.getDay() === 0
    },
    dateChange () { // 年/月发生改变
      var month = this.currentMonth
      var year = this.currentYear
      // 从1号开始
      this.currentDate = new Date(`${year}-${month}-1`)
    }
  }
}
</script>

<style  scoped>
/deep/ .el-calendar-day {
  height: auto;
}
/deep/ .el-calendar-table__row td,
/deep/ .el-calendar-table tr td:first-child,
/deep/ .el-calendar-table__row td.prev {
  border: none;
}
.date-content {
  height: 40px;
  text-align: center;
  line-height: 40px;
  font-size: 14px;
}
.date-content .rest {
  color: #fff;
  border-radius: 50%;
  background: rgb(250, 124, 77);
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
  font-size: 12px;
  margin-left: 10px;
  position: absolute;
}
.date-content .text {
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: inline-block;
}
/deep/ .el-calendar-table td.is-selected .text {
  background: #409eff;
  color: #fff;
  border-radius: 50%;
}
/deep/ .el-calendar__header {
  display: none;
}
</style>
